Abstract
A continuous reinforcement schedule for water was used for studying the parametric relationship between response rate and level of water deprivation in rats with septal lesions. Relative to control rats, the experimental rats, which did not show increased ad lib. water intake, had an increased response rate when the level of water deprivation was 48 hr and a reduced response rate when the level of deprivation was 12 hr. Water intake during the initial 20 min of the recuperation periods was the same in both groups. The results suggest reduced sensitivity to drive stimuli in rats with septal lesions when the level of deprivation was low and increased sensitivity to drive stimuli when the level of water deprivation was high.
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